Recent questions tagged q99

The magnetic field density applied in a cyclotron is $3.5 \;T$ what will be the frequency of electric field that must be applied between the dees in order to accelerate protons. Mass of protons $= 1.67 \times 10^{27}\;kg$

asked Aug 5, 2015 by meena.p

1 answer

The magnetic susceptibility of a super conductor is __________

asked Jul 22, 2015 by meena.p

1 answer

If a point change be rotated in a circle of radius r around a charge q, what will be the work done ?

asked Jul 8, 2015 by meena.p

1 answer

An electric kettle has two coils. When one of these is switched on, the water in the kettle boils in 6 minutes. When the other coil is switched on, the water boils in 3 minutes. If the two coils are connected in series , find the time taken to boil the water in the kettle .

asked Jul 3, 2015 by meena.p

1 answer

The total number of basic groups in the following form of lysine is

asked Mar 31, 2014 by thanvigandhi_1

1 answer

For highly reactive metals like alkali and alkaline earth metals, only way of reduction is

asked Mar 20, 2014 by meena.p

1 answer

Which of the following system has max number of unpaired electrons or max para magnetism.

asked Mar 13, 2014 by meena.p

1 answer

Lucite is a polymer of

asked Mar 12, 2014 by thanvigandhi_1

1 answer

The number of $\sigma$ and $\pi$ bonds in $ClO_3$ respectively

asked Mar 7, 2014 by sreemathi.v

1 answer

A sinusoidal electromagnetic plane wave travels through the empty space in $x$ - direction. The electric wave is polarized in the $y$ - direction frequency of waves is $1.5\: GHz$. At a certain point $P$ in space, the oscillating $E_y$ attains a maximum magnitude $E_o = 6.3 \: V/m$ \[\] The direction of magnetic field vector is along?

asked Mar 5, 2014 by thanvigandhi_1

1 answer

Optical and isomers are compounds which contain the same number and kinds of atoms, and bonds (ie the connectivity between atoms is the same), and different spatial arrangements of the atoms, but which have non-super imposable mirror images. Each non-super imposable mirror image structure is called an enantiomer. Optical isomers get their name because the plane – polarized light that is passed through a sample of a pure enantiomers is rotated. The planeis rotated in the opposite direction but with the same magnitude when plane- polarized light is passed through a pure sample containing the other enantiomer of a pair. A solution of one enantiomer rotates the plane of polrisation in a clockwise direction. This enantiomer is known as the (+) form. A solution of the other enantiomer rotales the plane of polarisation in an anti-clockwise direction. This enantiomer is known as (-) form.

asked Feb 27, 2014 by meena.p

1 answer

Which of the following statements is correct?

asked Feb 26, 2014 by sreemathi.v

1 answer

At 298K temperature ,the Henry constants for $Ar,CO_2,CH_4$ and $O_2$ are 40 kbar,1.6 kbar,0.41 kbar and 34 kbar respectively.Which of the following show maximum solubility in water at a given pressure?

asked Feb 17, 2014 by sreemathi.v

1 answer

At 293K temperature,the Henry's Law constants for $He,H_2,N_2$ and $O_2$ are 144 kbar,69 kbar,76 kbr and 34.86 kbar respectively. Which of the following show maximum solubility in water at a given pressure

asked Feb 14, 2014 by sreemathi.v

1 answer

Equation of conic defined by : $9yy'+4x=0 $ and given $y(0)=2$, find length of latus rectum

asked Feb 10, 2014 by meena.p

1 answer

Equation of conic defined by : $9yy'+4x=0 \qquad y(0)=2$ find length of latus rectum

asked Feb 10, 2014 by meena.p

0 answers

What is the relation between $b$ and $a$ for an hyperbola?

asked Feb 7, 2014 by sreemathi.v

1 answer

Two regression lines intersect at

asked Feb 1, 2014 by thanvigandhi_1

1 answer

A transistor is connected in common emitter mode. In the collector circuit the voltage drop across the resistor of $800 \; \Omega$ is $0.5 V$ . If current gain $\alpha$ is $0.96$ What is base current

asked Jan 31, 2014 by meena.p

1 answer

The thermal stability of $BaCO_3,CaCO_3$ and $MgCO_3$ is

asked Jan 29, 2014 by sreemathi.v

1 answer

$2NaOD$ is also known as

asked Jan 27, 2014 by sreemathi.v

1 answer

$Cl+O_3\rightarrow x+O_2,ClO+O\rightarrow y+O_2$.Net reaction :$O_3+O\quad\underrightarrow {Cl}\quad z$.The $z$ is

asked Jan 22, 2014 by sreemathi.v

1 answer

If $A,B,C$ are three points on $x\:axis,\:y\:axis\:and\:z\:axis$ respectively which are at the distances $a,b,c$ from origin respectively and $P$ is a point which is equidistant from $A,B,C,O$ then the coordinates of $P$ is?

asked Jan 21, 2014 by rvidyagovindarajan_1

1 answer

If $a, b, c$ are in AP and $a^2$, $b^2$, $c^2$ in GP, and $a+b+c=\frac{3}{2}$, then value of $c$ is

asked Jan 20, 2014 by yamini.v

1 answer

Which of the following reacts with $BCl_3$ to form diborane

asked Jan 17, 2014 by sreemathi.v

1 answer

The energy E for an electron in H atom is $\large\frac{21.7\times 10^{-12}}{h^2}$erg.Calculate the energy required to remove electron completely from $n=2$ orbit.Also calculate the longest wavelength of light that can be used to cause this transition.

asked Jan 16, 2014 by sreemathi.v

1 answer

$\lim\limits_{h\to 0}\large\frac{ln(1+2h)-2ln(1+h)}{h^2}=$

asked Dec 30, 2013 by sreemathi.v

1 answer

Integrate : $\int \large\frac{\tan^2 (\sqrt x)}{\sqrt x}$$.dx$

asked Dec 19, 2013 by meena.p

1 answer

Which one of the following statements is not true?

asked Dec 18, 2013 by thanvigandhi_1

1 answer

A parallelogram has adjacent sides $\overrightarrow a=3\overrightarrow p-\overrightarrow q\:\;and\:\:\overrightarrow b=\overrightarrow p+3\overrightarrow q$ where $ |\overrightarrow p|=|\overrightarrow q|=2$, and the angle between $\overrightarrow p\:\:and\:\:\overrightarrow q$ is $\large\frac{\pi}{3}$. The length of its diagonals are?

asked Dec 13, 2013 by rvidyagovindarajan_1

1 answer

Soluble fibrinogen is converted into insoluble fibrin by the action of :

asked Dec 11, 2013 by thanvigandhi_1

0 answers

Circular double helical DNA molecule is a

asked Dec 5, 2013 by thanvigandhi_1

0 answers

Which of the following ionic species has the greatest protons affinity to form stable compound?

asked Nov 27, 2013 by mosymeow_1

2 answers

Biramous appendages are present in :

asked Nov 27, 2013 by thanvigandhi_1

0 answers

A lead bullet of unknown mass is fired with a speed of $ 180 \: ms^{-1}$ into a tree in which it stops. Assuming that in this process two third of heat produced goes into the bullet and one third into wood. The temperature of the bullet raises by : ( Specific heat of lead $= 0.120 \: Jg^{-1\circ}C^{-1}$)

asked Nov 17, 2013 by thanvigandhi_1

1 answer

If $\sec\theta=m$ and $\tan\theta=n$ then $\large\frac{1}{m}$$\big[(m+n)+\large\frac{1}{(m+n)}\big]$

asked Nov 15, 2013 by sreemathi.v

1 answer

A wheel of radius 0.5 m rolls without sliding on a horizontal surface, starting from rest, the wheel moves with constant acceleration $6\: rad/s^2$ . The distance travelled by the centre of the wheel from $ t = 0 \: to \: t=3s$ is :

asked Nov 2, 2013 by thanvigandhi_1

1 answer

The vapour density of a mixture containing $NO_2$ and $N_2O_4$ is 38.3 at $27^{\large\circ}C$.Calculate the mole of $NO_2$ in 100g mixture

asked Oct 31, 2013 by sreemathi.v

1 answer

A body is floating in a liquid. At two temperatures $ t_1^{\circ}C\: and \: t_2^{\circ}C$ of the liquid, fractions $f_1 \: and \: f_2 $ of the volumes of the body remain immersed in the liquid. Coefficient of volume expansion of the liquid is

asked Oct 20, 2013 by thanvigandhi_1

1 answer

Which of the following is true in the case of an adiabatic process , where $ \gamma=Cp/Cv?$

asked Oct 18, 2013 by meena.p

0 answers

Two identical piano wires have a fundamental frequency of 600 c/s when kept under the same tension. What fractional increase in the tension of one wire will lead to the occurrence of 6 beats per second when both wires vibrate simultaneously?

asked Oct 11, 2013 by meena.p

1 answer

A stone tied to a rope is rotated in a vertical circle with a uniform speed. If the difference between the maximum and minimum tensions in the rope is 20 N, mass of the stone in kg is $( g = 10\: ms^{-2})$

asked Oct 9, 2013 by thanvigandhi_1

1 answer

3 moles of an ideal monatomic gas performs $ABCDA$ cyclic process as shown in figure below. The gas temperatures are $T_A=400\;K,T_B=800\;K,T_C=2400\;K,$ and $ T_D=1200\;K$. the work done by the gas is (approximately) $(R= 8.314\;J/mole K)$:

asked Sep 30, 2013 by meena.p

1 answer

A large open tank has two holes in the wall. One is a square hole of side $'L'$ at a depth $'y'$ from the top and the other is a circular hole of radius R at a depth $'4y'$ from the top. When the tank is completely filled with water, the quantities of water flowing out per second from the two holes are the same. Then value of R is :

asked Sep 24, 2013 by meena.p

1 answer

Efficiency of a heat engine whose sink is at a temperature of 300 k is $40 \;\%$. To increase the efficiency to $60 \;\%$, Keeping the sink temperature constant, the source temperature must be increased by

asked Sep 17, 2013 by meena.p

0 answers

Suppose universal gravitational constant starts to decrease, then

asked Aug 30, 2013 by meena.p

1 answer

Two masses of $0.1\;kg$ and $0.4 \;kg$ move towards each other with velocities $1 m/s$ and $0.1 m/s$ respectively. After collision they stick together . In 10 seconds the combined mass travels

asked Aug 9, 2013 by meena.p

1 answer

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